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# Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
# SPDX-License-Identifier: Apache-2.0
import copy
import pytest
from configuration import available_ports, ALL_TEST_CIPHERS, MINIMAL_TEST_CERTS
from common import ProviderOptions, Protocols, Signatures, data_bytes
from fixtures import managed_process # noqa: F401
from providers import Provider, S2N, OpenSSL, GnuTLS
from utils import (
invalid_test_parameters,
get_parameter_name,
get_expected_s2n_version,
to_bytes,
)
all_sigs = [
Signatures.RSA_SHA1,
Signatures.RSA_SHA224,
Signatures.RSA_SHA256,
Signatures.RSA_SHA384,
Signatures.RSA_SHA512,
Signatures.ECDSA_SECP256r1_SHA256,
Signatures.ECDSA_SECP384r1_SHA384,
Signatures.ECDSA_SECP521r1_SHA512,
Signatures.RSA_PSS_RSAE_SHA256,
Signatures.RSA_PSS_PSS_SHA256,
Signatures.ECDSA_SHA1,
Signatures.ECDSA_SHA224,
Signatures.ECDSA_SHA256,
Signatures.ECDSA_SHA384,
Signatures.ECDSA_SHA512,
]
def signature_marker(mode, protocol, cipher, signature):
# In versions before TLS1.3, the server uses the negotiated signature scheme for the
# ServerKeyExchange message. The server only sends the ServerKeyExchange message when using
# a key exchange method that provides forward secrecy, ie, NOT static RSA.
# So if using RSA key exchange, there is no actual "negotiated" signature scheme, because
# the server never sends the client a signature scheme.
#
# This mostly has to be inferred from the RFCs, but this blog post is a pretty good summary
# of the situation: https://timtaubert.de/blog/2016/07/the-evolution-of-signatures-in-tls/
if mode == Provider.ServerMode and cipher.iana_standard_name.startswith(
"TLS_RSA_WITH_"
):
signature = Signatures.NONE
elif protocol < Protocols.TLS12:
# ECDSA by default hashes with SHA-1.
#
# This is inferred from extended version of TLS1.1 rfc- https://www.rfc-editor.org/rfc/rfc4492#section-5.10
if signature.sig_type == "ECDSA":
signature = Signatures.ECDSA_SHA1
else:
signature = Signatures.RSA_MD5_SHA1
return to_bytes(
"{mode} signature negotiated: {type}+{digest}".format(
mode=mode.title(), type=signature.sig_type, digest=signature.sig_digest
)
)
def skip_ciphers(*args, **kwargs):
provider = kwargs.get("provider")
cert = kwargs.get("certificate")
cipher = kwargs.get("cipher")
protocol = kwargs.get("protocol")
sigalg = kwargs.get("signature")
if not provider.supports_signature(sigalg):
return True
if not cert.compatible_with_cipher(cipher):
return True
if not cert.compatible_with_sigalg(sigalg):
return True
if protocol > sigalg.max_protocol:
return True
if protocol < sigalg.min_protocol:
return True
return invalid_test_parameters(*args, **kwargs)
@pytest.mark.uncollect_if(func=skip_ciphers)
@pytest.mark.parametrize("cipher", ALL_TEST_CIPHERS, ids=get_parameter_name)
@pytest.mark.parametrize("provider", [OpenSSL, GnuTLS])
@pytest.mark.parametrize("other_provider", [S2N])
@pytest.mark.parametrize(
"protocol",
[Protocols.TLS13, Protocols.TLS12, Protocols.TLS11],
ids=get_parameter_name,
)
@pytest.mark.parametrize("certificate", MINIMAL_TEST_CERTS, ids=get_parameter_name)
@pytest.mark.parametrize("signature", all_sigs, ids=get_parameter_name)
@pytest.mark.parametrize(
"client_auth",
[True, False],
ids=lambda val: "client-auth" if val else "no-client-auth",
)
def test_s2n_server_signature_algorithms(
managed_process, # noqa: F811
cipher,
provider,
other_provider,
protocol,
certificate,
signature,
client_auth,
):
port = next(available_ports)
random_bytes = data_bytes(64)
client_options = ProviderOptions(
mode=Provider.ClientMode,
port=port,
cipher=cipher,
data_to_send=random_bytes,
insecure=False,
use_client_auth=client_auth,
key=certificate.key,
cert=certificate.cert,
signature_algorithm=signature,
protocol=protocol,
)
if provider == GnuTLS:
# GnuTLS fails the CA verification. It must be run with this check disabled.
client_options.extra_flags = ["--no-ca-verification"]
server_options = copy.copy(client_options)
server_options.extra_flags = None
server_options.data_to_send = None
server_options.mode = Provider.ServerMode
server_options.key = certificate.key
server_options.cert = certificate.cert
server = managed_process(S2N, server_options, timeout=5)
client = managed_process(provider, client_options, timeout=5)
for results in client.get_results():
results.assert_success()
expected_version = get_expected_s2n_version(protocol, provider)
for results in server.get_results():
results.assert_success()
assert (
to_bytes("Actual protocol version: {}".format(expected_version))
in results.stdout
)
assert (
signature_marker(Provider.ServerMode, protocol, cipher, signature)
in results.stdout
)
assert (
signature_marker(Provider.ClientMode, protocol, cipher, signature)
in results.stdout
) == client_auth
assert random_bytes in results.stdout
@pytest.mark.flaky(reruns=5, reruns_delay=2)
@pytest.mark.uncollect_if(func=skip_ciphers)
@pytest.mark.parametrize("cipher", ALL_TEST_CIPHERS, ids=get_parameter_name)
@pytest.mark.parametrize("provider", [OpenSSL, GnuTLS])
@pytest.mark.parametrize("other_provider", [S2N])
@pytest.mark.parametrize(
"protocol",
[Protocols.TLS13, Protocols.TLS12, Protocols.TLS11],
ids=get_parameter_name,
)
@pytest.mark.parametrize("certificate", MINIMAL_TEST_CERTS, ids=get_parameter_name)
@pytest.mark.parametrize("signature", all_sigs, ids=get_parameter_name)
@pytest.mark.parametrize(
"client_auth",
[True, False],
ids=lambda val: "client-auth" if val else "no-client-auth",
)
def test_s2n_client_signature_algorithms(
managed_process, # noqa: F811
cipher,
provider,
other_provider,
protocol,
certificate,
signature,
client_auth,
):
port = next(available_ports)
random_bytes = data_bytes(64)
client_options = ProviderOptions(
mode=Provider.ClientMode,
port=port,
cipher=cipher,
data_to_send=random_bytes,
insecure=True,
use_client_auth=client_auth,
key=certificate.key,
cert=certificate.cert,
protocol=protocol,
)
server_options = copy.copy(client_options)
server_options.data_to_send = None
server_options.mode = Provider.ServerMode
server_options.key = certificate.key
server_options.cert = certificate.cert
server_options.trust_store = certificate.cert
server_options.signature_algorithm = signature
kill_marker = None
if provider == GnuTLS:
kill_marker = random_bytes
server = managed_process(
provider, server_options, timeout=5, kill_marker=kill_marker
)
client = managed_process(S2N, client_options, timeout=5)
for results in server.get_results():
results.assert_success()
assert any([random_bytes in stream for stream in results.output_streams()])
expected_version = get_expected_s2n_version(protocol, provider)
for results in client.get_results():
results.assert_success()
assert (
to_bytes("Actual protocol version: {}".format(expected_version))
in results.stdout
)
assert (
signature_marker(Provider.ServerMode, protocol, cipher, signature)
in results.stdout
)
assert (
signature_marker(Provider.ClientMode, protocol, cipher, signature)
in results.stdout
) == client_auth
|
